4Kanno H,Ozawa Y,Sakata K,et al.lntraoperative power Doppler ultraaonography with a contrast-enhancing agent for intracranial turnora[J].J Neurosur6,2005,102 (2): 295-501.
8Melada A, Heinrich Z, Chudy D, et al. The difference between ultrasound-guided and stereotactic-guided neurosurgical procedures. Minim Invasive Neurosurg, 2000, 43 : 149-152.
9LeRoux PD,Winter TC, Berger MS, et al. A comparison between preoperative magnetic resonance and intraoperatlve ultrasound tumor volumes and margins. J Clin Ultrasound, 1994,22 : 29-36.